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1.
报道了西藏兰科植物6种分布新记录种,分别为石斛属( Dendrobium Sw.)的单葶草石斛( D. porphyrochilum Lindl.)、曲唇兰属[ Panisea (Lindl.) Steud.]的云南曲唇兰( P. yunnanensis S. C. Chen et Z. H. Tsi)、苹兰属( Pinalia Lindley)的长苞苹兰[ Pi. obvia (W. W. Smith) S. C. Chen & J. J. Wood]、白点兰属( Thrixspermum Lour.)的长轴白点兰[ T. saruwatarii (Hayata) Schltr.]和石豆兰属( Bulbophyllum Thou.)的柄叶石豆兰( B. apodum J. D. Hooker)、细柄石豆兰[ B. striatum (Griff.) Rchb. f.],并附有新记录种的描述及特征照片。凭证标本保存于西藏高原生态研究所标本室(XZE)。 相似文献
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报道了中国兰科(Orchidaceae)植物一新记录种——广坝石斛兰(Dendrobium lagarum Seidenf.)。它与景洪石斛(D. exile Schltr.)相似,但本种不分枝,茎上部"Z"字形,叶片较稀疏;茎基不膨大成纺锤形,具有7~8条均匀的纵脊线,花大小约为景洪石斛的一半,唇瓣中裂片近三角形,蕊柱足不具球状胼胝体。 相似文献
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海南石斛属和金石斛属植物多糖及氨基酸含量分析 总被引:2,自引:0,他引:2
石斛(Dendrobium Sw.sp.)为贵重的中药之一,国内外学者在其有效成分的研究中做了大量的工作[1]. 相似文献
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报道了中国兰科植物一未详知种——喉红石斛Dendrobium christyanum Rchb.f.,提供了其形态描述和墨线图。它在形态上与矮石斛Dbellatulum Rolfe相似,但其唇瓣白色,唇盘中央橘红色,侧裂片和中裂片基部有黄色晕而与后者不同。这两种植物隶属石斛属黑毛组Sect Formosae。 相似文献
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中国石斛属(兰科)一未详知种--喉红石斛 总被引:1,自引:0,他引:1
报道了中国兰科植物一未详知种——喉红石斛Dendrobium christyaaum Rchb.f.,提供了其形态描述和墨线图。它在形态上与矮石斛D.bellatulum Rolfe相似,但其唇瓣白色,唇盘中央橘红色,侧裂片和中裂片基部有黄色晕而与后者不同。这两种植物隶属石斛属黑毛组Sect.Fonnosae。 相似文献
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麻栗坡石斛,中国兰科一新变种 总被引:1,自引:0,他引:1
对中国兰科新变种麻栗坡石斛(Dendrobium moniliforme var. malipoense L.J.Chen et Z.J.Liu )作了描述和绘图.该新变种与原变种细茎石斛(Dendrobium moniliforme var.moniliforme (L.) Sw.)的区别在于新变种的植株非常细小,长4~6 cm;茎肉质,纺锤形,有3~6节,被偏鼓的叶鞘所包;花序轴长1~2 cm,花中萼片狭矩圆形,唇盘上具3条褶片. 相似文献
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报道了中国兰科植物1新记录种,即苏瓣石豆兰(Butbophyllum dayanum Rchb.f.),本种的花序具2~5朵花,萼片和花瓣的边缘被流苏状丝质毛,可与该组的其他种相区别.将Dendrobium menglaensis X.H Jin & H.Li归并为杓唇扁石斛(D.chrysocrepis Parish & Rchb.f.ex Hook.f.)的新异名,该种的花单生于压扁状的茎上,唇瓣勺状,与其近缘种易于区别. 相似文献
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兰科石斛属植物菌根真菌研究进展 总被引:1,自引:0,他引:1
石斛属(Dendrobium)隶属于兰科(Orchidaceae)树兰亚科(Epidendroideae)石斛兰族(Dendrobiinae),是兰科最大的属之一,终生附生于树上或岩石上。石斛属很多种类具有很高的药用价值与观赏价值。由于人为过度采挖和野生生境的破坏,使得野生石斛资源濒临灭绝。石斛属植物为典型的兰科菌根植物,在自然条件下需要与真菌共生,才能完成生活史。菌根真菌对于石斛属植物的种子萌发和植株生长具有重要的作用。对石斛属植物菌根的形成、菌根真菌的作用、菌根真菌多样性及菌根技术在石斛属植物中的应用做了评述,并对今后的研究内容和重点提出了一些思路。 相似文献
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报道了中国兰科(Orchidaceae)植物二新记录种,即镰叶鸢尾兰(Oberonia falcata King & Pantl.)和坎布里鸢尾兰(O.kanburiensis Seidenf.)。镰叶鸢尾兰茎较长,叶镰曲状,萼片反折,唇瓣中裂片二裂呈锐角,先端尖;坎布里鸢尾兰花瓣及唇瓣边缘流苏状,唇瓣中部缢缩,在中裂片先端最宽。 相似文献
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P. Angelini R. Pagiotti B. Granetti 《World journal of microbiology & biotechnology》2008,24(2):197-202
Melaleuca alternifolia (tea tree) essential oil was investigated for its “in vitro” ability to control Trichoderma harzianum, a fungal contaminant that causes extensive losses in the cultivation of Pleurotus species. The antifungal activity of M. alternifolia essential oil and antagonist activities between Pleurotus species against three T. harzianum strains were studied in dual-culture experiments on an agar-based medium in which different concentrations of essential oil
were incorporated. M. alternifolia essential oil at a concentration of 0.625 μL/mL, inhibited T. harzianum mycelial growth by 5.9–9.0%, depending on the strain. At the same concentrations P. ferulae and P. nebrodensis stimulated mycelial growth by 5.2–8.1%. All strains of T. harzianum were antagonistic to the Pleurotus species in the control. When essential oil was added to the substrate cultural, the antagonistic activity of T. harzianum against the Pleurotus species was weak (0.0625 μL of essential oil) or non-existent (0.125 μL of essential oil). M. alternifolia essential oil could be an alternative to the synthetic chemicals that are currently used to prevent and control T. harzianum in mushroom cultivation. 相似文献
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本文描述采自河北小五台山的黑粉菌一新种,即寄生在野青茅(Deyeuxia arundinacea(L.) Beauv)上的野青茅黑粉菌(Ustilago deyeuxiae L. Guo)。此种与网优黑粉菌(Ustilago scrobiculata Liro)近似,但野青茅黑粉菌网纹明显,网眼高。并报道三种黑粉菌中国新记录。1)酢浆草黑粉菌(Ustilago oxalidis Ellis&Tracy)寄生于醉浆草(Oxalis corniculata L.),此种是我国首次在酢浆草科(Oxalidaceae)植物上发现的黑粉菌。2)网状黑粉菌(Ustilago polygoni-alati Thirum. & Pavgi)寄生于尼泊尔萝(Polygonum nepalense Meisn.),作者对此种进行了订正研究。3)臭草条黑粉菌(Urocystis melicae (Lagerheim & Liro) Zundel)寄生于细叶臭草(Melica radula Fr.)。 相似文献
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Ellen C. Lake Judith Hough-Goldstein Kimberley J. Shropshire Vincent D’Amico 《Biological Control》2011,58(3):294-301
Mile-a-minute weed, Persicaria perfoliata (L.) H. Gross (Polygonaceae), is an annual vine from Asia that has invaded the eastern US where it can form dense monocultures and outcompete other vegetation in a variety of habitats. The host-specific Asian weevil Rhinoncomimus latipes Korotyaev (Coleoptera: Curculionidae) was first released in the US in 2004 as part of a classical biological control program. The weevil was intensively monitored in three release arrays over 4 years, and field cages at each site were used to determine the number of generations produced. The weevil established at all three sites and produced three to four generations before entering a reproductive diapause in late summer. Weevils dispersed at an average rate of 1.5–2.9 m wk−1 through the 50 m diameter arrays, which had fairly contiguous mile-a-minute cover. Weevils dispersing in the broader, more variable landscape located both large monocultures and small isolated patches of mile-a-minute 600–760 m from the release within 14 months. Weevil density ranged from fewer than 10 to nearly 200 weevils m−2 mile-a-minute weed. Mile-a-minute cover decreased at the site with the highest weevil density. The production of P. perfoliata seed clusters decreased with increasing weevil populations at two sites, and seedling production declined over time at two sites by 75% and 87%. The ability of the weevil to establish, produce multiple generations per season, disperse to new patches, and likelihood of having an impact on plants in the field suggests that R. latipes has the potential to be a successful biological control agent. 相似文献
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Melaleuca alternifolia andM. linariifolia are commercially important Australian species harvested for their essential oils. Both species have relatively narrow and disjunct distributions on the central coast of eastern Australia. Variation in the chloroplast genome was assessed for eight individuals from each of twelve populations, representing the species' geographic range. Low nucleotide diversity withinM. alternifolia contrasted with high nucleotide diversity inM. linariifolia. CpDNA data are consistent with the southern population ofM. alternifolia being a hybrid population withM. linariifolia. The two species are sympatric in this region. Variation inM. linariifolia was geographically structured, with northern populations differing from southern populations by seven restriction site mutations, five length mutations and an inversion. There was no evidence of hybridisation of the cp genome of northernM. linariifolia with the partially sympatric speciesM. trichostachya. Intra- and interspecific variation in the chloroplast genomes ofM. alternifolia, M. linariifolia, andM. trichostachya indicate considerable potential for the use of intraspecific cpDNA studies in examining phylogenetic relationships in melaleucas. 相似文献
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报道了中国兰科植物一新记录种,即西蒙长足兰[Pteroceras simondianum(Gagnep.)Aver.],并提供了描述和图片。本种形态与长足兰[P.leopardinum(Par.&Rchb.f.)Seidenf.&Smitin.]相似,但叶明显较宽,偏斜;花淡黄色,略被绛紫色斑块或条纹;子房光滑;花粉块为孔裂等,易于区别。 相似文献
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Elwin G. Smith Rosemarie A. De Clerck-Floate Brian H. Van Hezewijk James R. Moyer Eva Pavlik 《Biological Control》2009,48(3):281-286
The cost of rearing the root-feeding weevil, Mogulones cruciger Herbst, to control the invasive weed houndstongue (Cynoglossum officinale L.) was determined for two managed production methods. Production in an insectary setting provides control over rearing and all adult weevils that emerge can be collected, but required facility investment and high labor input. Mass-rearing in a managed ‘field crop’ setting required less facilities and labor while the insects were multiplying, but capture of the emerged adults was challenging and labor intensive. Estimated per adult weevil production costs were $CDN 2.65 for the insectary approach, and from $CDN 0.10 to $CDN 0.14 for mass-rearing in the managed field crop setting. Even though collection of adult weevils in the field crop production system was challenging, commercial production of M. cruciger should consider use of this mass-rearing method because of its lower cost. 相似文献